4)The common belief is that those are "backwards" tapes of guitar solos at the end of the song. In fact, Lennon and Harrison first recorded the guitars together, then played the tapes backwards for the record. But they weren't satisfied with that sound. So they spent about a day actually learning to play their solos to sound like the backwards tapes.In other words, what we hear on the record is Harrison and Lennon actually playing their guitars live to sound like themselves playing backwards... quite impressive I dare say ??)